powerpc/mpc8xxx: move LAW code into arch/powerpc/cpu/mpc8xxx

It's arch code and not a driver, so move it where it belongs.  When it
originally went into drivers/misc there was no 8xxx CPU directory.

This will make new-SPL support a little easier since we can keep the CPU
stuff together and not need to pull stuff in from drivers/misc.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Andy Fleming <afleming@freescale.com>
diff --git a/nand_spl/board/freescale/mpc8536ds/Makefile b/nand_spl/board/freescale/mpc8536ds/Makefile
index 822ae7c..bc3ba35 100644
--- a/nand_spl/board/freescale/mpc8536ds/Makefile
+++ b/nand_spl/board/freescale/mpc8536ds/Makefile
@@ -86,7 +86,7 @@
 
 $(obj)fsl_law.c:
 	@rm -f $(obj)fsl_law.c
-	ln -sf $(SRCTREE)/drivers/misc/fsl_law.c $(obj)fsl_law.c
+	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc8xxx/law.c $(obj)fsl_law.c
 
 $(obj)law.c:
 	@rm -f $(obj)law.c